Why is a little exaggeration a bad thing?

Common practice

Padding out your resume with some carefully placed exaggerations
is very common practice amongst candidates,
common enough that most employers recognise this
as a major risk, and will carefully investigate
your claims and qualifications.

They may bring experts to the interview
to test your knowledge, use one of the many CV checking agencies, and will check
your references.

Risks

If you are given the job and your little white lies are discovered, you
could be up for instant dismissal. Worse than that, your employer will ask
that you pay back your starting bonus, and may even sue you to recover
recruitment and training costs! Even small exaggerations, when discovered,
will mark you as untrustworthy in the eyes of your employer, and your career
will be badly affected.

Not worth the effort

If you think you need to lie about your skills and experience to get a job, you
are probably not well suited to the job anyway.

Searching through MyJob.ie

This site will show you all the vacancies which call for any level of
any skill you have claimed.
If you claim to be a beginning Java programmer with no
commercial experience, you will still see a job which calls for
expert Java programmers with 5 years commercial experience. There is no need to
exaggerate your skill level to increase the number of jobs you can see.
The only jobs which will be
hidden from your view will be those where you have none of the required skills,
or jobs that are not offered in your location.